Respuesta :

A. 4
The degree has to equal 180 so 180-140=40 40=(10)(4)

Answer:

4

Step-by-step explanation:

We know that this is a supplementary angle, which means the sum of two angles is 180 degrees.

The Equation would then be:

140+10x=180

All you need to do is solve for x.

140+10x=180

-140         -140 (Subtract 140 from both sides)

        10x=40   (Divide by 10)

           x=4

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